Parameter degeneracies in neutrino oscillation measurement of leptonic CP and T violation

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dc.contributor.authorMinakata, H.
dc.contributor.authorNunokawa, H.
dc.contributor.authorParke, S.
dc.contributor.institutionTokyo Metropolitan Univ
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionFermilab Natl Accelerator Lab
dc.date.accessioned2014-05-20T14:06:13Z
dc.date.available2014-05-20T14:06:13Z
dc.date.issued2002-11-01
dc.description.abstractThe measurement of the mixing angle theta(13), sign of Deltam(13)(2), and the CP or T violating phase delta is fraught with ambiguities in neutrino oscillation. In this paper we give an analytic treatment of the paramater degeneracies associated with measuring the nu(mu)-->nu(e) probability and its CP and/or T conjugates. For CP violation, we give explicit solutions to allow us to obtain the regions where there exist twofold and fourfold degeneracies. We calculate the fractional differences, (Deltatheta/(θ) over bar), between the allowed solutions which may be used to compare with the expected sensitivities of the experiments. For T violation we show that there is always a complete degeneracy between solutions with positive and negative Deltam(13)(2) which arises due to a symmetry and cannot be removed by observing one neutrino oscillation probability and its T conjugate. Thus there is always a fourfold parameter degeneracy apart from exceptional points. Explicit solutions are also given and the fractional differences are computed. The biprobability CP/T trajectory diagrams are extensively used to illuminate the nature of the degeneracies.en
dc.description.affiliationTokyo Metropolitan Univ, Dept Phys, Tokyo 1920397, Japan
dc.description.affiliationUniv Estadual Paulista, Inst Fis Teor, BR-01405900 São Paulo, Brazil
dc.description.affiliationFermilab Natl Accelerator Lab, Dept Phys Theor, Batavia, IL 60510 USA
dc.description.affiliationUnespUniv Estadual Paulista, Inst Fis Teor, BR-01405900 São Paulo, Brazil
dc.format.extent15
dc.identifierhttp://dx.doi.org/10.1103/PhysRevD.66.093012
dc.identifier.citationPhysical Review D. College Pk: American Physical Soc, v. 66, n. 9, 15 p., 2002.
dc.identifier.doi10.1103/PhysRevD.66.093012
dc.identifier.fileWOS000179679400017.pdf
dc.identifier.issn0556-2821
dc.identifier.urihttp://hdl.handle.net/11449/23246
dc.identifier.wosWOS:000179679400017
dc.language.isoeng
dc.publisherAmerican Physical Soc
dc.relation.ispartofPhysical Review D
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titleParameter degeneracies in neutrino oscillation measurement of leptonic CP and T violationen
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmerican Physical Soc
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Física Teórica (IFT), São Paulopt

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